Cooling arrangement for machine bearings



P. SUTER COOLING ARRANGEMENT FOR MACHINE BEARINGS Filed Jan. 25, 1926 all) Patented Apr. 29, 1930 UNITED STATES PATENT OFFICE PHILIP]? SUTER, OF BADEN, SWITZERLAND, ASSIGNOR TO AKTTENGESELLSCHAFT BROWN BOVERI & CIE, OF BADEN, SWITZERLAND, A JOINT-STOCK COMPANY OF SWITZERLAND COOLING ARRANGEMENT FOR MACHINE BEARINGS Application filed January 25, T9536, Serial No. 83,502, and in Germany February 2, 1925.

This invention relates to an arrangement for cooling bearings of rotary machine parts. It is of particular utility in situations Where it is desirable to cool both the bearing and associated parts. It finds advantageous application in the construction of electrical motors.

The general object of the invention is the provision of a construction which is simple and efiicient and may be combined as a part of the elements which it is desired to cool.

Another object of the invention is the provision of a construction which will be effective in small clearances, and which obviates the necessity of materially enlarging the machine frame construction for its accommodation.

Another object is the provision of a construction which is proof against functional disturbances and requires no individual at tention in the way of upkeep.

Other and further objects will be pointed out hereinafter, indicated in the appended claim, or obvious to one skilled in the art upon an understanding of the present disclosure.

For-the purpose of this application I illustrate and describe herein one form in which the invention may be embodied, but it is to be understood that the structure may take other forms without departing from the scope of the appended claim.

In the drawing forming a part of this specification Fig. 1 is a longitudinal sectional View of a motor part embodying the invention, and

ig. 2 is a sectional view on line 2-2 of Fig. 1.

Referring to the parts shown in the drawing, let it be understood that the reference numeral 10'designates supporting frame portion on which is mounted a bearing portion 11 in which a rotary shaft 12 is journalled. Formed on the hearing or bearing housing portion 11, or mounted thereon, is a plurality of radial fin or guide elements 14. The shaft carries a rotary element 15 adja cent the bearing, forming the mounting for the slip rings 16 arranged for co-operation with the motor brushes in customary fashion. Carried for rotation with the shaft 12 is a plurality of fan blades 17, here shown as formed on the outer slip-ring. These blades revolve adjacent the fins or guides 14 incident to rotation of the shaft andexercise the ac tion of a centrifugal fan, throwing the air outwardly from their orbit. This induces a circulation of air between the elements 14, somewhat in the direction indicated by the arrows, said elements contributing thereto as guides battling the air against rotary movement. At the same time they conduct heat from the bearing and discharge it into the air circulated in contact with them. The fan blades likewise diffuse heat from the portions to which they are attached, and maintain currents of air across the slip rings and adjacent portions in a manner to contribute effectively to the dispersal of heat therefrom. By giving the blades a slight pitch, they may be rendered eifective to force air against the members 14:, such being a reversal of their ac tion from that under the arrangement shown.

What I claim is In machine construction, a frame portion, a bearing including a portion carried by said frame portion, a shaft journaled in said hearing, said bearing portion being provided with fins extending radially with respect to the axis of rotation of said shaft and disposed on the interior side of said frame portion, a

slip ring carried by said shaft for-rotation therewith and disposed in proximity to said bearing portion, and fan blades carried by said slip ring and extending laterally outwardly therefrom toward said fins and being ceoperable with the latter to induce air cil culation within said machine.

In testimony whereof I have hereunto subscribed my name at Zurich, Switzerland, on

the 11th day of January, A. D. 1926.

PHTLIPP SUTER. 

